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