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