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