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