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