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