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