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