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