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