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