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