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