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