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