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