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