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