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