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