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