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