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