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