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