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