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