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