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