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