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