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