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)(11,12)(17,18)(19,24)(20,30)(21,23)(22,26)(25,34)(27,40)(28,35)(29,38)(31,39)(32,37)(33,36)(41,45)(42,47)(43,46)(44,48) involution — undirected(1,3,5,4)(2,6,8,7)(9,10,13,14)(11,16,12,15)(18,23)(20,31)(22,33)(24,35)(25,39)(27,42)(29,43)(30,41)(32,44)(34,45)(37,47)(40,48)(1,3,5,4)(2,7,8,6)(9,11,13,12)(10,15,14,16)(17,19)(18,24)(20,32)(21,28)(22,29)(23,35)(25,40)(26,38)(27,34)(30,37)(31,44)(33,43)(36,46)(39,48)(41,47)(42,45)(1,4,5,3)(2,6,8,7)(9,11,13,12)(10,15,14,16)(17,20,33,45,21,34,22,31)(18,25,36,39,23,30,26,41)(19,27,43,44,28,32,29,42)(24,37,46,47,35,40,38,48)(2,8)(6,7)(9,12,13,11)(10,15,14,16)(18,23)(19,28)(25,30)(26,36)(27,32)(29,43)(39,41)(42,44)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.