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