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