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