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