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