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