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