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