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