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