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