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)(12,14)(13,16)(17,18)(19,22)(20,24)(21,23)(25,29)(26,31)(27,30)(28,32)(5,7,8,6)(9,11,13,12)(10,14,16,15)(17,19,20,26,21,27,28,25)(18,22,24,31,23,30,32,29)(1,2,3,4)(9,11,13,12)(10,15,16,14)(19,25)(20,28)(22,29)(24,32)(26,27)(30,31)(9,12,13,11)(10,15,16,14)(18,23)(22,30)(24,32)(29,31)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.