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)(11,13,15,16)(19,23)(22,24)(1,2)(3,5)(4,7)(6,8)(9,11,12,15)(10,13,14,16)(17,18,21,20)(19,22,23,24)(26,29)(30,32)(1,3,6,4)(2,7,8,5)(9,10)(11,13)(12,14)(15,16)(17,18,21,20)(19,22,23,24)(25,26,28,29)(27,30,31,32)(1,4,6,3)(2,7,8,5)(9,11)(10,13)(12,15)(14,16)(17,19,21,23)(18,22,20,24)(1,5,6,7)(2,3,8,4)(9,10)(11,13)(12,14)(15,16)(17,20,21,18)(19,24,23,22)(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.