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