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