Several sites offer LDS clip art, including LDSClipart.com and MormonShare.com. Both of these sites feature a variety of clip art for primary classes, family home evenings, missionary discussions or general purposes.
LDSClipart has clip art for several topics including baptism, missionary work, marriage and prophets. Some color images are ideal for bulletin boards and other uses, while the black and white images could be used as coloring pages for primary classes.
MormonShare has a huge collection of files related to the LDS church and culture. Topics are arranged alphabetically and range from celestial marriage to youth conference resources. Many topics feature not only clip art, but lesson plans, poems, supplements and activity ideas.