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)(11,14,15,16)(17,18)(19,29)(20,25)(21,31)(22,32)(23,28)(24,26)(27,30)(1,3,4,8)(2,5,6,7)(17,19)(18,25)(20,23)(21,30)(22,24)(26,27)(28,29)(31,32)(10,13)(14,16)(17,20,21,30,23,19,24,22)(18,25,31,27,28,29,26,32)(2,6)(5,7)(17,21,23,24)(18,26,28,31)(19,30,20,22)(25,27,29,32)(3,8)(5,7)(9,11,12,15)(10,14,13,16)(17,22,24,19,23,30,21,20)(18,27,26,25,28,32,31,29)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.