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