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