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