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