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