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