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