If you’re attracted to women and transmen it means you’re attracted to the female sex, rather than the female gender. It isn’t cissexist to be attracted to a specific sex, just as it isn’t racist to be attracted to a specific race. People don’t choose their sexuality.

The sign implies that “escorts” provide a higher quality service than do “hookers”, not that they’re higher quality people. Equivalently: “Gourmet chefs working at fry cook prices!”