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