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