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