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