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