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