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