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