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