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