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