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