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