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