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