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)(18,23)(24,30)(25,31)(27,32) involution — undirected(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,18,21,23)(19,24,22,30)(20,27,29,32)(25,28,31,26)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,19,21,22)(18,24,23,30)(20,26,29,28)(25,32,31,27)(10,13)(14,16)(17,20,21,29)(18,25,23,31)(19,26,22,28)(24,32,30,27)(2,7)(6,8)(9,11,12,15)(10,14,13,16)(17,19,21,22)(18,24,23,30)(20,28,29,26)(25,27,31,32)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.