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