One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,10)(3,14,16,32)(5,11,23,37)(6,12,26,9)(7,13,22,38)(8,19,29,47)(15,31,45,35)(17,44,50,30)(18,53,48,41)(20,55,25,40)(21,34,28,36)(24,39,49,43)(27,42,56,33)(46,59,51,62)(52,58,64,60)(54,63,57,61)(1,3,5,17,7,19,25,52)(2,8,11,30,13,32,40,60)(4,15,20,46,22,48,23,57)(6,18,27,54,28,45,24,51)(9,29,33,58,34,14,43,44)(10,35,37,62,38,53,55,63)(12,41,42,59,36,31,39,61)(16,49,50,21,47,56,64,26)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.