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