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