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