Usually, scholarships in the area of graphic design and art are provided by the schools of design and art (Like Cal Institute of Design and Art), to help with costs at that school.
Most of the time those specific scholarships are designed for people who are planning to be in the major.
Also, they are generally small.
Check scholarship websites for open scholarships. Right now is not a good time because most students have received their financial aid packages and are desperately searching for funds.