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