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