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