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