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