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