The university is wrong on this. I hope they do the right thing and avoid the lawsuit.
"Mullins said members of each team also are expected to adhere to policies set by the coach. Bartow's policy includes statements regarding expected behavior for cheerleaders."
I'm siding with the University. Sounds like they want their cheerleaders to be seen in a certain way, wholesome young ladies. Half dressed waitresses doesn't fit the image they are trying to project. And it sounds like she signed an agreement stating such.
If it's a double standard they might want to review policies but cheer leading is a privelege not a right. I kind of look at it as a club. If there were rules and she agreed to them she should have tried to get changes but not have broken them.