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