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