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