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