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