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