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