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