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