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