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