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