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