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