Try to make bathtime as fun as possible. It's easiest to start this OUTSIDE, because a bathtub can feel like a deathtrap to a dog who isn't used to water yet. Keep some treats handy and start with the water spraying AWAY from her. If her water fears are pretty severe, you may need to sit the hose down completely with the water running. Feed her treats close to the hose. When she's comfortable, crouch down and pick up the hose, still holding it very low to the ground. Keep feeding treats so she's not panicking. If she starts to freak and you can't get her calmed down, start over. This time maybe just keep your hand on the hose without picking it up.
If she's doing good, stop. Take a playtime break so she can relax. Maybe 15-20 minutes later or more, try again. Start at step one again and work your way back up. Depending on the dog, you may be able to start spraying the water close to her now. Pick up the hose and slowly move the water closer to her. Let it run several seconds at one distance, then move just slightly closer, run a few seconds, closer, etc. Keep a steady stream of treats going so she's focused on getting the yummy snacks and starts to associate water with rewards. If she's doing good, this is another good stopping point. Play break then try again. When you do start actually spraying her, ALWAYS start with the feet. NEVER start spraying her right over her head or neck. You'll never get any progress at all. Slowly work your way up from her BACK feet to higher on her back legs. If she'll let you, you can try slowly working your way forward. For your first "training" bath, don't even worry about neck/head.
Don't get aggravated and clench the leash or yell. Stay relaxed. If she starts to freak, take it back a step. If you are relaxed rather than getting worked up when she freaks out, it will be easier for her to calm down. If you're worked up and she's worked up, then she thinks obviously there's something to be worked up about--Mom's worked up too! So just stay relaxed. Don't get frustrated and take as much time as she needs. Eventually you'll have a dog who is perfect for baths and even enjoys them. Remember that for each bath, you'll need to start with the early stages for quite a while so she knows you aren't just going to attack her with the hose. Starting easy with the early steps will help reassure her that the water isn't as scary as she thought.
I'd also avoid grooming salons until she's PERFECT for baths. You never know what kind of handler she'll get--you could get someone great who will take the extra time she needs, or you could get someone who's just trying to get their job done fast and could care less if they stress out the dog. If she's making good progress at home and then you rush her to a grooming salon because you don't have time to bath her, a bad groomer will put her back to square one and afraid of baths.
Hope this helps. I've had dogs of both kinds--one of my Border Collies LOOOVES water and likes to attack it. It took patience and just a little bit of work to get her to understand that bathtime is not the time to play with the water. She's perfect for baths now, but just as a reward if she has an outside bath, I occasionally give her some water play after a bath so she can look forward to bathtime. One of my others hasn't liked baths since he was a pup. As a young puppy he would SCREAM when I tried to bathe him. Bath time took forever and he needed a lot of reassurance and work. He's very timid anyway, and it's taken a lifetime of patience with him to get him willing to stand still for baths. He's no longer afraid of bathtime although he's still not crazy about it. He stands still though and he knows now it's not so bad.
Hope this helps. Good luck!