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