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