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