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)(19,24)(20,25)(21,31)(22,23)(26,32)(27,30)(28,29)(33,34,38,40)(35,39,42,36)(37,45,47,41)(43,44,48,46)(4,11)(8,14)(10,15)(12,16)(18,23)(20,29)(24,30)(26,31)(33,35)(34,39)(36,40)(37,43)(38,42)(41,46)(44,45)(47,48) involution — undirected(2,7)(3,9)(8,14)(10,15)(18,23)(19,27)(25,28)(26,31)(34,40)(35,42)(41,45)(43,48) involution — undirected(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,19)(18,24)(20,26)(21,28)(22,27)(23,30)(25,32)(29,31)(33,35)(34,36)(37,43)(38,42)(39,40)(41,44)(45,46)(47,48) involution — undirected(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,20,22,29)(18,25,23,28)(19,26,27,31)(21,24,32,30)(33,36)(34,35)(37,46)(38,39)(40,42)(41,48)(43,45)(44,47)(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,21,22,32)(18,26,23,31)(19,28,27,25)(20,30,29,24)(33,37,38,47)(34,41,40,45)(35,43,42,48)(36,44,39,46)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.