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