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