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