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