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