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