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