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