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