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