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