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