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