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