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)(17,18,23,25)(19,24,28,22)(20,26,30,31)(21,27,29,32)(33,34,38,39)(35,36,41,40)(37,45,47,42)(43,46,48,44)(4,11)(8,14)(10,15)(12,16)(17,19)(18,24)(20,29)(21,30)(22,25)(23,28)(26,32)(27,31)(34,39)(36,40)(42,45)(44,46) involution — undirected(2,7)(3,9)(8,14)(10,15)(18,25)(19,28)(20,30)(27,32)(33,35,38,41)(34,40,39,36)(37,43,47,48)(42,46,45,44)(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,20,23,30)(18,26,25,31)(19,29,28,21)(22,27,24,32)(33,35)(34,40)(36,39)(37,43)(38,41)(42,46)(44,45)(47,48)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21,23,29)(18,27,25,32)(19,20,28,30)(22,31,24,26)(33,36,38,40)(34,41,39,35)(37,46,47,44)(42,43,45,48)(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,22)(18,28)(19,25)(20,27)(21,26)(23,24)(29,31)(30,32)(33,37,38,47)(34,42,39,45)(35,43,41,48)(36,44,40,46)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.