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