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