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