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