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