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