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