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)(19,20)(21,26)(22,29)(23,25)(24,28)(27,31)(30,32)(35,41)(36,43)(38,44)(39,46) involution — undirected(1,3,6,4)(2,7,9,11)(5,10,14,12)(8,15,13,16)(17,19,23,28)(18,24,25,20)(21,31,32,22)(26,29,30,27)(33,34,37,40)(35,38,41,44)(36,39,43,46)(42,45,47,48)(3,4)(7,11)(10,12)(15,16)(18,25)(20,24)(26,30)(27,29)(33,35)(34,38)(36,42)(37,41)(39,45)(40,44)(43,47)(46,48) involution — undirected(1,4,6,3)(2,7,9,11)(5,12,14,10)(8,15,13,16)(17,20)(18,19)(21,27)(22,30)(23,24)(25,28)(26,31)(29,32)(1,2)(3,7)(4,11)(5,13)(6,9)(8,14)(10,16)(12,15)(17,21,23,32)(18,26,25,30)(19,22,28,31)(20,29,24,27)(33,34)(35,38)(36,39)(37,40)(41,44)(42,45)(43,46)(47,48)(1,5,6,14)(2,8,9,13)(3,10,4,12)(7,15,11,16)(17,22)(18,27)(19,21)(20,30)(23,31)(24,26)(25,29)(28,32)(33,36,37,43)(34,39,40,46)(35,42,41,47)(38,45,44,48)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.