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