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