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