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