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