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