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