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