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