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