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