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