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