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