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