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