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