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