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