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