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