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