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