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