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