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