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