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