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