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