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