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