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