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