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