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