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