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