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