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