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