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