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