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