One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10,12,14)(11,13,15,16)(17,18,21,25,20,23,29,24)(19,26,28,31,27,22,30,32)(1,3,5,4)(2,6,7,8)(11,15)(13,16)(17,19,20,27)(18,22,23,26)(21,30,29,28)(24,32,25,31)(2,7)(6,8)(9,11,12,15)(10,13,14,16)(18,23)(22,26)(24,25)(31,32)(1,4,5,3)(2,8,7,6)(18,24)(21,29)(22,31)(23,25)(26,32)(28,30)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.