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