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