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