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