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