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