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