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