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