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