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