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