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