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