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