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