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