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