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