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