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