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