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