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