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