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