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