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