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