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)(17,18)(19,26)(20,23)(21,32)(22,25)(24,30)(27,29)(28,31)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(17,19,22,30)(18,24,25,26)(20,28,32,27)(21,31,23,29)(1,3,5,4)(2,7,8,6)(10,15)(11,16)(17,20)(18,21)(19,27)(22,32)(23,25)(24,29)(26,31)(28,30)(1,3,5,4)(2,7,8,6)(9,12,13,14)(10,16,15,11)(17,18)(19,28)(20,21)(22,25)(23,32)(24,29)(26,31)(27,30)(1,4,5,3)(2,7,8,6)(17,21,22,23)(18,20,25,32)(19,29,30,31)(24,27,26,28)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.