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