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