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)(11,15)(12,14)(13,16)(17,18,20,21)(19,23,24,22)(25,26,29,32)(27,30,28,31)(2,6)(3,8)(9,11)(10,15)(12,13)(14,16)(18,21)(22,23)(25,27,29,28)(26,30,32,31)(3,8)(4,7)(10,12)(11,16)(17,18,20,21)(19,23,24,22)(25,27,29,28)(26,30,32,31)(1,3,5,8)(2,7,6,4)(9,12,14,10)(11,13,16,15)(17,18)(19,22)(20,21)(23,24)(25,26)(27,30)(28,31)(29,32)(1,4,5,7)(2,8,6,3)(9,13)(10,11)(12,16)(14,15)(17,19,20,24)(18,22,21,23)(25,28,29,27)(26,31,32,30)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.