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