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