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)(11,16)(12,13)(14,15)(19,23)(21,24)(27,31)(30,32)(2,6)(3,8)(10,15)(11,12)(25,26,29,28)(27,30,31,32)(2,6)(4,7)(9,11,14,12)(10,13,15,16)(17,18,20,22)(19,21,23,24)(25,27)(26,30)(28,32)(29,31)(1,3,5,8)(2,7,6,4)(9,12,14,11)(10,13,15,16)(17,19)(18,21)(20,23)(22,24)(25,28,29,26)(27,32,31,30)(1,4,5,7)(2,8,6,3)(9,13)(10,11)(12,15)(14,16)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.