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