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