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