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