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