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