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