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