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