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