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