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