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