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