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