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