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