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