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