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