TinyDiego you say "salon" so I assume you mean for women? If, however, you are looking for a Dominican barber shop, there is one near Finch and Weston Road. It's in Plaza Latino on Milvan Drive. There are always lots of Dominicans hanging out there so it's also a bit of a social club.
Here are some salons but I'm not sure if they are exclusively Dominican:
Lucy?s Beauty Centre
6 Westmoreland Avenue, Toronto
416-530-4930
Mariana Hairstyling
1547 Jane Street, Toronto
416-247-7353
Latin Hair Design
1889 Eglinton Avenue West, Toronto
416-785-1977
Hair Design by Maria
1886 Eglinton Avenue West, Toronto
4167823380