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