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