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