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