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