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