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