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