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