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