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