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