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