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