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