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