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