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