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