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