One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,9)(5,8)(6,10)(11,14)(12,16)(13,15)(17,18)(19,27)(20,23)(21,25)(22,26)(24,30)(28,32)(29,31) involution — undirected(1,3)(2,7)(4,11)(5,13)(6,12)(8,15)(9,14)(10,16)(18,23)(19,28)(20,21)(24,27)(25,26)(31,32) involution — undirected(2,8)(4,5)(7,14)(9,10)(11,13)(15,16)(17,19,20,29,22,28,21,30)(18,24,25,32,26,31,23,27)(1,4,6,5)(2,9,10,8)(3,11,12,13)(7,14,16,15)(19,28)(24,31)(27,32)(29,30)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.