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