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