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