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