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