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