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