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