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)(17,18,21,25)(19,26,22,23)(20,28,30,24)(27,31,29,32)(1,3,5,4)(2,6,8,7)(9,11,14,10)(12,15,13,16)(19,22)(20,29)(23,26)(24,31)(27,30)(28,32)(9,12,14,13)(10,15,11,16)(17,19,21,22)(18,23,25,26)(20,29,30,27)(24,32,28,31)(9,13,14,12)(10,16,11,15)(17,20,22,29,21,30,19,27)(18,24,23,31,25,28,26,32)(1,4,5,3)(2,7,8,6)(20,30)(24,28)(27,29)(31,32)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.