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