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