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