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