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