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