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