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