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