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