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