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