One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,16)(13,14)(17,18,23,26,22,19,20,24)(21,25,29,32,30,27,28,31)(10,14)(11,12)(17,19,22,18)(20,24,23,26)(21,25,30,27)(28,32,29,31)(2,5)(6,8)(9,11,13,12)(10,15,14,16)(17,20,22,23)(18,24,19,26)(21,29,30,28)(25,32,27,31)(9,12,13,11)(10,16,14,15)(17,21,22,30)(18,25,19,27)(20,28,23,29)(24,31,26,32)(1,3,4,7)(2,6,5,8)(21,30)(25,27)(28,29)(31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.