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