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