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