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