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