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