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