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