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