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