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