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