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