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