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