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