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