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