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