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