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