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