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