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