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