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