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