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