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