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