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