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