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