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