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