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