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