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