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