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