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