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