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