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