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