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