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