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