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