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