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