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