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