One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18,21,26)(19,28,31,24)(20,34,23,25)(22,27,36,43)(29,44,46,38)(30,39,33,41)(32,45,47,40)(35,48,37,42)(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,21,31)(18,24,26,28)(20,33,23,30)(22,29,36,46)(25,41,34,39)(27,38,43,44)(32,35,47,37)(40,48,45,42)(1,3)(2,6)(4,8)(5,7)(10,14)(13,16)(19,29)(20,23)(22,37)(24,38)(25,34)(27,42)(28,44)(30,47)(31,46)(32,33)(35,36)(39,40)(41,45)(43,48) involution — undirected(3,8)(5,6)(11,15)(13,16)(17,20,21,23)(18,25,26,34)(19,30,31,33)(22,35,36,37)(24,39,28,41)(27,42,43,48)(29,32,46,47)(38,45,44,40)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.