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)(11,14)(12,16)(13,15)(17,18,22,26)(19,23,24,20)(21,25,30,32)(27,29,31,28)(2,5)(3,7)(9,11,13,12)(10,14,15,16)(17,19)(18,23)(20,26)(21,28)(22,24)(25,27)(29,30)(31,32)(9,12,13,11)(10,14,15,16)(17,20,26,19,22,23,18,24)(21,29,32,31,30,28,25,27)(2,5)(6,8)(17,18,22,26)(19,23,24,20)(21,25,30,32)(27,29,31,28)(1,3,4,7)(2,6,5,8)(17,21,26,32,22,30,18,25)(19,27,23,29,24,31,20,28)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.