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