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