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