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