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