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