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