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