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