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