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