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