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