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