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