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