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