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