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