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)(19,28)(20,31)(21,23)(22,26)(24,27)(25,29)(30,32)(2,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,19,22,29)(18,25,26,28)(20,23,30,24)(21,31,27,32)(9,12,13,10)(11,15,16,14)(17,20,24,19,22,30,23,29)(18,25,21,32,26,28,27,31)(1,3,5,4)(2,7,6,8)(11,16)(14,15)(17,21,24,26,22,27,23,18)(19,28,30,31,29,25,20,32)(1,4,5,3)(2,7,6,8)(18,26)(21,27)(25,28)(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.