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