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