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