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