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