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