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