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