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