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