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