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