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