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