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