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