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