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