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