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