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