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