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