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