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