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