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