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