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