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