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