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