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