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)(11,16)(12,15)(13,14)(17,18)(19,24)(20,22)(21,23)(25,26)(27,30)(28,32)(29,31)(2,3)(6,7)(9,11,14,12)(10,15,13,16)(17,19,22,21)(18,23,20,24)(25,27,29,32)(26,30,31,28)(4,8)(6,7)(10,13)(15,16)(19,21)(23,24)(25,27)(26,28)(29,32)(30,31) involution — undirected(1,3,5,2)(4,7,8,6)(9,12,14,11)(10,16,13,15)(17,20,22,18)(19,23,21,24)(25,27)(26,28)(29,32)(30,31)(1,4,5,8)(2,6,3,7)(9,13,14,10)(11,16,12,15)(17,21,22,19)(18,23,20,24)(25,28)(26,27)(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.