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