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