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