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