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