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