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