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)(19,30,34,46)(20,26,23,39)(21,28,35,47)(22,37,36,27)(25,41,45,33)(31,48,40,43)(32,44,38,42)(4,13)(8,12)(9,16)(11,14)(17,19)(18,25)(20,31)(21,33)(22,38)(23,40)(24,34)(26,42)(27,46)(28,43)(29,45)(30,37)(32,36)(35,41)(39,44)(47,48) involution — undirected(1,3)(2,6)(4,14)(5,10)(7,15)(8,16)(9,12)(11,13)(17,20,24,23)(18,26,29,39)(19,31,34,40)(21,22,35,36)(25,42,45,44)(27,28,37,47)(30,48,46,43)(32,33,38,41)(2,7)(6,15)(8,12)(9,16)(17,21,23,36,24,35,20,22)(18,27,26,28,29,37,39,47)(19,32,31,33,34,38,40,41)(25,43,44,46,45,48,42,30)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.