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