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