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