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