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