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