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