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