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