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)(19,28,31,22)(21,26,23,32)(25,27,29,30)(1,3,4,8)(2,5,6,7)(9,10)(11,13)(12,14)(15,16)(17,19,23,30,24,31,21,27)(18,25,26,28,20,29,32,22)(2,6)(3,8)(9,11,12,15)(10,13,14,16)(17,20,24,18)(19,29,31,25)(21,26,23,32)(22,27,28,30)(2,6)(5,7)(10,14)(13,16)(17,21,24,23)(18,26,20,32)(19,30,31,27)(22,29,28,25)(2,6)(5,7)(17,22,23,25,24,28,21,29)(18,27,26,19,20,30,32,31)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.