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