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