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)(27,35)(28,39)(29,33)(30,34)(31,38)(32,36)(37,50)(40,49)(41,55)(42,47)(43,46)(44,56)(45,52)(48,53)(51,54)(1,3)(2,6)(4,7)(5,8)(9,11)(10,14)(12,19)(13,18)(15,23)(16,22)(17,20)(21,24)(25,27,30,38)(26,31,34,35)(28,40,42,36)(29,43,45,37)(32,47,49,39)(33,50,52,46)(41,53,44,54)(48,55,51,56)(1,4,5,2)(3,7,8,6)(9,12)(10,15)(11,17)(13,20)(14,21)(16,24)(18,19)(22,23)(25,28,38,40,30,42,27,36)(26,32,35,47,34,49,31,39)(29,44,43,53,45,41,37,54)(33,51,50,55,52,48,46,56)(3,8)(6,7)(12,20)(15,24)(17,19)(21,23)(25,29)(26,33)(27,37)(28,41)(30,45)(31,46)(32,48)(34,52)(35,50)(36,53)(38,43)(39,55)(40,54)(42,44)(47,56)(49,51) involution — undirected(10,16)(11,18)(15,24)(17,19)(26,34)(29,45)(31,35)(32,49)(37,43)(39,47)(41,44)(53,54) 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.