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