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