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