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