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