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