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