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