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