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