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