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