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