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