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