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