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