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