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