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