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)(19,30)(20,32)(21,25)(22,28)(23,27)(24,29)(26,31)(5,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,23,20,24,31,22,21)(18,25,28,26,29,32,27,30)(2,4)(5,7,8,6)(11,15)(13,16)(17,20,22,19,24,21,23,31)(18,26,27,25,29,30,28,32)(17,21,22,31,24,20,23,19)(18,26,27,25,29,30,28,32)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.