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