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