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