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