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