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