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)(17,18,22,27,23,28,21,26)(19,29,32,40,33,39,31,24)(20,34,35,25,37,41,36,42)(30,38,44,47,46,48,45,43)(1,3,5,10,6,11,4,12)(2,7,13,14,9,15,8,16)(17,19)(18,24,28,40)(20,30)(21,31)(22,32)(23,33)(25,38,42,48)(26,39,27,29)(34,43,41,47)(35,44)(36,45)(37,46)(17,20)(18,25)(19,30)(21,35)(22,36)(23,37)(24,38)(26,41)(27,34)(28,42)(29,43)(31,44)(32,45)(33,46)(39,47)(40,48) involution — undirected(1,4,6,5)(2,8,9,13)(3,10,11,12)(7,14,15,16)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,35,37,36)(24,39,40,29)(25,41,42,34)(30,44,46,45)(38,47,48,43)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.