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