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