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