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