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