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