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