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