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