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