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