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