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