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