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