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)(33,34,39,42)(35,40,46,54)(36,47,49,58)(37,43,38,51)(41,52,57,48)(44,59,62,64)(45,55,50,56)(53,60,63,61)(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)(33,35,39,46)(34,40,42,54)(36,44,49,62)(37,50,38,45)(41,53,57,63)(43,56,51,55)(47,59,58,64)(48,61,52,60)(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)(34,41)(35,44)(37,48)(38,52)(39,49)(40,53)(42,57)(43,58)(45,60)(46,62)(47,51)(50,61)(54,63)(55,59)(56,64)(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)(34,42)(40,54)(41,57)(43,51)(47,58)(53,63)(55,56)(59,64) 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)(33,37,39,38)(34,43,42,51)(35,45,46,50)(36,48,49,52)(40,55,54,56)(41,58,57,47)(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.