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