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