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