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