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