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