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