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