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