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