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