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