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