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