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