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