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