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