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