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