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