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