One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10,12,14)(11,15,16,13)(17,18,24,23)(19,28,22,25)(20,26,29,31)(21,32,30,27)(1,3,5,8)(2,6,4,7)(11,16)(13,15)(17,19,24,22)(18,25,23,28)(20,30,29,21)(26,32,31,27)(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,20)(18,26)(19,21)(22,30)(23,31)(24,29)(25,27)(28,32)(1,2,5,4)(3,6,8,7)(9,10)(11,13)(12,14)(15,16)(17,21,24,30)(18,27,23,32)(19,29,22,20)(25,31,28,26)(1,2,5,4)(3,6,8,7)(17,22,24,19)(18,25,23,28)(20,30,29,21)(26,27,31,32)(1,4,5,2)(3,7,8,6)(17,23,24,18)(19,28,22,25)(20,31,29,26)(21,32,30,27)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.