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