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