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