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