the "suvat" equations ARE vector equations. The "s" is specifically the displacement vector; u and v are velocity vectors; a is the acceleration vector. Usually you learn to use suvat in "unilinear" motion which is one dimensional. When doing so, the mathematics is the same as simple algebra. If you are working in two or three dimensions, then your operations for adding and multiplying vectors gets a bit more complicated.
Instead of v=35m/s, for example, you get v=35î +23ˆj +12ˆk m/s, etc.
So the equations themselves are the same. You can indicate vectors with the "harpoon" over the letter, or "blackboard bold" (my favorite) or any other conventional vector indication, but usually "suva" are all assumed to be vectors. I wouldn't worry about it in homework, or quick calculations, but in any report or other typed format, I'd at least indicate all vector varibles in bold type.