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