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