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