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