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