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