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