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