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