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