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