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